https://bugs.kde.org/show_bug.cgi?id=494685

--- Comment #13 from Massimiliano L <m.lince...@gmail.com> ---
I found a pattern that may make this reproducible.

> mkdir test-directory
> cd test-directory
> touch 
> VfEsm_So_gMzlIKp_aMuwp-stElm_kMAIgPZ_uiI_USaGGz_FlmejDmXpHX_nYBRyu_30-04-2024.txt
> touch 
> VfEsm_So_gMzlIKp_aMuwp-stElm_kMAIgPZ_uiI_USaGGz_FlmejDmXpHX_nYBRyu_30-04-2024.pdf

Now, enter test-directory with Dolphin and adjust the zoom to regulate the size
of the icons until the two filenames show as follows.

The txt:
---
VfEsm_So_gMzlIKp_
aMuwp-stElm_k
MAIgPZ_uiI_US....txt
---

The pdf:
---
VfEsm_So_gMzlIKp_
aMuwp-stElm_k
MAIgPZ_uiI_US....
---

Now, here is the curious part: upon entering the directory, the pdf extension
does not show, as per example. It is displayed on a *new line* in the filename
following one of these two events (1) moving the mouse cursor from the
directory panel to any of the Dolphin panels/bars (2) a mouse click on the
empty space in the directory panel. Hovering the mouse on the files or even
clicking on them does not trigger the appearance of the extension.

And it is exactly *that file extension* that lingers when switching to a
different directory.

In summary, when Dolphin abbreviates long filenames:
- some file extensions are not displayed when they should;
- some events trigger Dolphin to display these extensions, but they are painted
in the wrong place;
- when switching to a different directory, the extensions painted in the wrong
place remain as ghosts until the window is repainted.

To reproduce it, I think one has to nail the correct combination of filename
length and icon size.

Interestingly enough, going from the minimum to the maximum size of the icons
with the slider or CTRL + scroll wheel results in Dolphin painting a "trail" of
extensions along the way.

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